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中红外光谱学可用于验证A2牛奶的真实性

S V Chirife¹, E Albanell¹, X Such¹

¹Group of Ruminant Research (G2R), Department of Animal and Food Sciences, Universitat Autònoma de Barcelona (UAB), 08193, Bellaterra, Spain.

Journal of dairy science

|July 17, 2025

概括

中红外光谱学可以验证A2牛奶的真实性,A2牛奶比A1牛奶更容易消化,这是由于β-素的遗传变异造成的. 这种方法为大规模A2牛奶认证提供了快速而非侵入性的方法.

科学领域:

乳制品科学乳制品科学
分析化学分析化学
遗传学遗传学是一个

背景情况:

A2牛奶,不同于A1牛奶的β-素的遗传变异,更容易消化.
这种变异可以防止在消化过程中释放β-casomorphin-7.
对寻求更容易消化的消费者来说,A2牛奶的认证至关重要.

研究的目的:

评估中红外 (MIR) 光谱法用于鉴定荷尔斯坦牛的A2牛奶的真实性.
评估MIR光谱作为一种快速,非侵入性和可扩展的方法.
为了将光谱数据与遗传变异和牛奶质量参数相关联.

主要方法:

从2,270个荷尔斯坦牛奶样本收集了光谱,遗传 (β-casein,kappa-casein,β-lactoglobulin) 和牛奶质量数据.
对牛奶成分进行了统计分析,并对光谱数据进行了初步主要成分分析 (PCA).
开发了一种用于A1/A2牛奶认证的部分最小平方差异分析 (PLS-DA) 模型.

主要成果:

牛奶质量参数在蛋白质分数中相似,但在农场之间略有差异.
PCA不能有效分离基于β-素遗传学的A1和A2牛奶.
在将牛奶分类为A1和A2类别时,PLS-DA实现了高平衡的准确性 (高达94%的培训,88%的测试).

结论:

与PLS-DA相结合的MIR光谱学显示出对认证A2牛奶真实性的重大前景.
这种方法为例行,大规模的A2牛奶验证提供了可行的工具.
进一步验证可能会提高特定基因型的准确性.

关键词:

在PCA中,PCA是PCA.在PLS-DA中.中红外光谱学中红外光谱学.这种β-素是β-素.

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